Pantographic milling-machine.



N0. 842,247. PATENTED JAN. 29, 190-7.

' F. H. RICHARDS.

PA NTOGRAPHIC MILLING MACHINE.

APPLICATION TILED DEG.20,1900.

6 SHEETS-SHEET 1.

PATENTED JAN. 29 1907.

F. H. RICHARDS. PANTOGRAPHIG MILLING MACHINE.

APPLICATION FILED DEO.20,1900.

n1, W. g WW W v. a n 1 a r m M M PATENTED JAIL 29, 1907.

No.- 842,247. I I

'P. H. RICHARDS. PANI'OGRAPHIG MILLING MACHINE.

APPLIGATIOH FILED DEO.20,1900.

6 SHEETS-SHEET '3.

)figggnessea- PATENTBD JAN. 29, 1907.

F. H. RICHARDS.

PANTOGRAPHIG MILLING MACHINE.

APPLICATION FILED DEO.20,1900.

6 SHEETSSHEET 4.

' lulu- Ill- 144 No. 842,247. PATENTED JAN. 29, 1907.

I P; H. RICHARDS. PANTDGRAPHIG MILLING-YMAGHINB.

APPLICATION FILED DEG.20. 1900.

a SHEETS-BEBE? if" 58 WIN v 1 I g Ill I ll messex- I 1921*992102,"

5 7/ Wwix No. 842,247. PATENTED JAN; 29, 1907.

P. H. RICHARDS.

PANTOGRAPHIG MILLING MACHINE.

APPLICATION FILED DEG.20,1900.

6 SHEETSSHEET 6.

UNITED STATES PATENT-- OFFICE.

FRANCIS H. RICHARDS, OF HARTFORD, CONNECTICUT, ASS1GNOR,BYMESNE ASSIGNMENTS, OF ONE-HALF AMERICAN TYPOGRAPHIC CORPORA- TION, A CORPORATION OF NEW JERSEY.

PANTOGRAFHIC I MILLING-NIACHINE..

Specification of Letters Patent.

Patented Jan. 29, 1907.

- A iicati fiied December 20,1900. -seria1No'.4o,571.

Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Pantographic lVIilling-Machines, of which the following is a specification.

This invention relates to improvements in pantographic milling machines, and more particularly to those for the purpose of mill ing out raised or intaglio objects in metal. and other materials.

In the accompanying drawings, Figure 1 is a top plan view of a machine made according to the present invention. Fig. 2 is an end elevation thereof looking from the left in eral way some suitable base Fig. 1. Fig. 3 is a side elevation, parts being in section. Fig. 4 is an enlarged plan view of that portion of the machine carrying the cutting-tool. Fig. 5 is an end elevation of the same. Fig. 6 is an enlarged side eleva-,

tion of the pattern follower or tracer- Fig. 7 is a vertical section-on the line a a of Fig. 6. Figs. 8 and 9 are respectively aside elevation and a plan view of the connecting .ends of one of the pantograph members adjacent to the cutting-tool. Figs. 10 and 11 are similar views of the coacting member. Figs. 12, 13, and 1 1 are respectively a plan, a side elevation, and a vertical section of another joint between the pantograph members. Figs. 15 and 16 are respectively a side elevation and a central vertical transverse section of the mechanism for actuating the tool. Fig. 17 is a top plan view of a support for a pattern. Fig. 18 is a similar view with the pattern in place. Fig. 19 is a side elevation of Fig. 18 looking from the lower toward the upper side with reference to the plan View thereof and showing in addition the tracer in Contact with the pattern. Fig. 20 is a partial perspective view of the same with the tracer in two positions. Fig. 21. is a diagrammatic plan view of the mechanism, illustrating the movement of the pantograph members; and. Fig. 22 is a diagrammatic side elevation showing thetool in two positions.

Similar characters designate likeparts in the different figures of the drawings.

in the embodiment of my invention shown herewith the numeral 10 designates in a genor near one end of. which is a pair of lugs 11. These lugs are prov ded with openings in which are pivotpins 12, having inclined or conical points, with these points in horizontal alinement. The pins may be retained in the openings by slitting the lugs, as shown at 13, and drawing the parts together by'screws 14. Mounted upon the pins 12 as an axis, with depressions corresponding in form engaging their pointed ends, is an oscillatory frame, (designated as a whole by F.) This is of a form suitable to support the elements hereinafter described and may be constructed of tubular members 15 15, united by collars 16, to which they are brazed or otherwise secured. Upon the upper side of four of the frame members those designated as 15 may be formed raised ways 17, the surfaces of which lie in a common plane. On these ways slide four members 18 18 19 19 of a pantograph system, (designated as a whole byP,) each member being preferably provided with a raised surface20 for Contact with one of the ways 17.

The members 18 18 are pivoted together at one end, one of these, as 18, being provided with bifurcated arms 21 21, which may be slit longitudinally in a vertical plane at 22 and have openings in vertical alinement, in which fit pivot-pins 23, provided with inclined surfaces or points at each end and which are clamped in place by screws 24, serving to drawthe slit portion of the arms together.- The corresponding end of the other member, as 18, isshown as of a suitable width to enter between the arms 21 of the bracket 30, which, since it rocks with the pantograph system when the latter is rocked transversely to its plane, may, as in this instance, be secured to the frameF near one of its pivots. The depressions 28 are shown as formed in u per and lower cups 31 32, re-

spectively, t e latter situated in a recess in the lower arm and the upper adjustably held in the opening in the upper arm, which is slit at 33 and the parts drawn together and the 1p clamped in place by screws 34.

Tl e ad'a 5'2". 'ids "f the pairs'of members reg;

18 18; and 19 19' are pivotally jointed to;

gether, a convenient way of forming, this joint beinghere shown. In Figs. 12, 13 and 14 the members 18 and 19 are shown; but thefmembers 18 and 1 9 are also shown as similarly constructed in the other views.

Each member 19 19 has a bifurcated end, between the arms 35 of which projects a reduced end piece 36, carried by the member 18 18. One of the arms is providedwith an opening, preferably cylindrical, toreceive a pivot-pin 37, having a similarly-formed portion and an inclined or conical inner end,

which engages the correspondingopening or depression in one face of the piece 36. The pin 37 may be retained in place by a slit 38 and binding-screw 39,-such-as has been previously described. A screw 40 may be threaded intothe arm adjacent to the pivotpin, with the under side of its head extending above the same, and may serve by its-pressure thereon to adjust the pin to a bearing in the slngle pin securing the members together,

, while the plane faces on the end piece and late may shift over one another as the pin is brought down to its bearing. At the same time the capability for rotation of the plate permits the free operation of the 'oint. By mounting these pivot-pins and 0t er-s in the machine in smooth ings rather than by t eading the contacting I -surfaces they may be moved 1n and out witha'horizontal position.

"above them, the under sides of the retainingbars contacting with plane surfaces 43 upon said members p The frame F may be supported in its lowest position by a loose stop, which is shown as a hollow cylinder 10*, standing upon its end on a plane surface of the base and of such a height that a parallel portion of the frame at 10 will contact with it when said frame is in This cylinder constitutes a stop for limitingthe downward movepgrallely-situated open-.

with a handle 54.

ment of the frame, while a screw 10, threaded through the frame at 10", with its lower end extending through the cylinder and adapted to bear upon the base-plate, serves to raise the frame from this lower limiting position. A spring 10*, secured to the base and put under tension by the pressure of the frame upon it, serves to counterbalance in a measure the weight of said frame and supported pantograph system.

Upon the base in proximity to the joint be-, tween the members-19 19 is'provided means for fasteningia pattern-support,- such means as here indicated consisting of abutments 44 44 u on the base with springs 44, adapted to be (fiaw'n downward by screws 44" and a threaded lug 45, through which turns a setscrew 45, Asillustrated in the drawings,

this screw holds in place against the abut- 1 ments a pattern-support comprisin a plate 46, bearing upon its upper surface s ort columns or projections 47 of a suitable sha e to support a pattern 48, which may be sol ered or otherwise secured thereon. At the opposite end of the base near the. connection between the members 18 18, and preferably within the .vertical plane of the same, is mbunt-ed a holder or chuck for the piece upon which the work is to be done, consisting of a plate 49, secured-to the base and from which there extends an abutment 50 and a lug 51. Against an angle of the former the piece of metal upon which the work is to be done may rest, being held in place by a set-screw 52,

threaded through the lug.-

Secured to one of the bars 19 19 near their juncture where they move over the patternsupport is a pattern follower or tracer, (designated as a whole by E,) which may consist of a body 53,fixed to the lower arm 35 and bent u over the other arm, where it is provided The lowerportion has a vertical threaded openingto receive a screw 55 upon a head 56, provided with a patternfollowing surface, preferably of conical shape and having its axis lying in the axis of the pivotal connection between the members. The screw is preferably slit at 55 to enable the fit to be sufficiently tight to prevent its turning from the contact of the conical surface with the pattern; but it may be screwed in and out by a knurled surface about its upper edge, and this movement varies the relation of the tracer to the pattern when the system is in a horizontal position.

In the illustrated organization the tool for operating upon the work'is mounted upon the pantographic system as follows: In 0 enings located in the arms 21 21 of the bifurcated end of a member 18 and nearerthe base of such arms than the pins 23, already referred to, (see Fig. 8,) are cups 57, having at their outer. ends depressions with inclined walls, and in similar openings in the sidesof the corresponding end portion of the other member 18 and located farther from the extreme end of the member than the pivot-re-' cesses 27 (see Fig. are like cups 58. The former cups may be retained in position by the same clamping device as secures the pins 23, while the latter cups may be held by a like arrangement of slit wall and set-screw The depressions in the cups 557 57 receive suitably-shaped points. upon pairs of pivot-pins 6O 60, while the depressions in the cups 58 58 receive suitably-shaped points upon pairs of pivot-pins 59 59. The two pairs of"oppos itely-disposed pins 60 60 and cutting-tool 65.

' arms.

59 59 are mounted, respectively, in arms 61 and 62 62, which constitute the'cell or section ofthe main pantograph system. They are here clamped in openings in such members with an intersecting slit and a set-screw 2 1", while, as'illustrated, the upper pins may have adjustingscrews similar to 40, previously described. The member 61 is formed in a single piece, its horizontal arms being connected by a vertical portion, while the member 62 62 consists of two separate The arms of both members have openings through which extends a vertical sleeve 63, the arms of the member 62 62 being clamped upon it by the .set-scr'ews'24 and the other turning loosely about it retained against longitudinal movement by the aforesaid clamped member. Within the sleeve is journaled 'a driving-shaft 6 1 for a In the illustrated 'construction the shaft is provided with a conical portion 66, which fits a similarly-shaped bearing inside of the sleeve, and an annular enlargement or ring 67 at the end of the conical portion abutting against the end of the sleeve. By the adjustment of a nut 68, having an annular flange projecting under the ring andholding it and the cone in the bearing in the sleeve, the wear may be taken up, A split clutch 69 upon the lower end of the shaft serves to hold acu-tting-tool. It will be apparent'that while a tendency to spring the arms 21 21 apart might be created by reasonof an undue pressure of the pins 2323 against their respective sockets 27 27 the pressure or 601. .pressive action of the pivot-pins 6O 60 operate-to neutralize this tendency.

To impart rotation to the tool, the shaft 64 may be provided at its upper end with a disk or plate 70, carrying an upwardly-projecting This extends into a slot 72 in an op positely-placed disk or plate 73 on the lower pin7l.

end of a short shaft 74, journaled in an arm of the bracket 30! The shaft 74 is provided with a suitable pulley 76, which may be rotated by a belt from any suitable source of power.

I the shaft 7 4 and the shaft 64 permits the latter to move with its pivoted supports without changing the position of the formeror the tension of the driving-belt.

It will be seen that the members 18 18 19 The shiftable connection between 7 bers in connection with equal lengths ofthe members 18 18 a smaller parallelogram with the tool having the same relation with respect to the similar angle thereof. A copy of the object about which the. tracer is moved may therefore be produced, being reduced in size to an extent dependent upon the ratio of the long and short members. At the same time the factthat the entire'system is capable of vertical movement about an axis ad-. jacent to the cutting-toolgives said tool a like reduced vertical movement, and as the tracer is DJOVGClIlP and down the edges of the 7 pattern the inclined surface of the tracer permits a smooth uniform movement in differ ent planes, which tracing movement will be reproduced to a reduced extent, as aforesaid. by a similarly-inclined cutting-face of the tool, the point of which preferably forms an angle equal to the point of the follower.

At the commencement of the operation, the pattern being in place upon its support and the piece of metal from which the object is to be made, as a die or punch, clamped in place, the. tracer is turned outward by its screw until the upper end or largest portion of the conical surface will contact with the pattern. This holds the cutter at some distance-from the plane of the finishedsurface of the work and will enable the operator as he moves the tracer about the pattern to take a preliminary or roughing out. Then by screwing in the tracer a certain distance the tool may be made to take a position somewhat nearer the plane of finish and another cut taken, this continuing at desired intervals until the tracer has beenbrought up into contact with its support, when the finishing cut may be taken. When the work is being done in an opening inclos d by metal, as in the center of the letter 0], \for example, the supportingf'rame may be. raised by the screw 10 until the point ofth toolis above the work, and then it can be fed gradually downward into the metal and successive cuts taken until the finish cut is reached at the time whenthe supporting-frame rests upon stop 10 Having described my invention, I claim- IOC 1. The combination with a pivotally- 2. The combination with a pantograph system comprising a large and a small cell and which is pivotally -mounted to swing about a vertical axis, of a supporting-frame in contact with a member of which each member of the large cell is adapted to slide, and which frame is adapted to oscillate about a horizontal axis; a'tool carried by one cell of the system; and a tracer carried by the other ce 1.

3. The combination with a pantograph system comprising a large and a small cell, and which is pivotally mounted to swing about a vertical axis, of a supporting-frame in contact with a member of which each member of the large cell is adapted to slide, and which frame is adapted to oscillate about a horizontal axis; a rotative tool carried by one cell of the system; and a tracer carried by the other'cell.

4. The combination with'a pantograph system comprising a largeand a small cell and which is pivotallymounted to swing about a vertical axis, of a supporting-frame in contact. with a member of which each member of the large cell is adapted to slide, and which frame is adapted to oscillate about a horizontal axis; a rotative tool carried by one cell of the system; and a tracer carried by the other cell and having a conical operative surface.

5. The combination witha pantograph system comprising a large and a small cell and which is pivotally mounted 'to swing about a vertical axis, of a supporting-frame in contact-with a member of which each member of the large cell is adapted to slide, and' which frame is adapted to oscillate about a horizontal axis; a rotative tool carried by one cell of the system; a tracer mounted on the other cell and adjustable toward and away from the plane of the system and having a'conical operative surface.

with saidframe;

6. The combination with a support for the -members of a pantograph system and which support is oscillatory about an axis disposed substantially parallel to the plane of the system, of a pantograph system slidably mounted thereon and pivotally connected therewith; a tool and a tracer carried by the system; and retaining-bars secured to said support and between which and the support the pantograph system is adapted to slide. I

a 7. The combination with an oscillatory frame, of a pantograph system pivotally mounted thereon and having a pivotal axis betweentwo of its jointed members coincident with the pivotal axis of its connection 8. The combination with an oscillatory I supporting-frame having a pair of projecting arms, of a pantograph system comprisin a member having a bifurcated end located etween the said projecting arms and a member' projecting into the space between the limbs of said bifurcation; and a pair of pivotpins secured to said limbs and each engaging at one end with an arm of the supporting frame and at the other end with the end ortion of the second-mentioned member 0 the pantograph system.

9. The combination with an oscillatory supporting-frame having a pair of projecting arms provided with cylindrical bearing parts adjustably secured to the arms, ,of a panto- 'raph system comprising a member having a bifurcated end located between the said projecting arms and a member projectin into the space between the limbs of said bi ureation; and-a pair of cylindrical pivot-pins adjustably secured to said limbs, the outer ends of said pins being conical and entering sockets in the said bearing parts of said arms and the inner ends of said pins being likewise conical and entering sockets in the end portion of the secondmentioned member of the system.

10. An articulated pantograph j system comprising pairs of jointed members, one of which members is bifurcated and the other of which enters the space between the limbs of such bifurcation; and a pair of cylindrical pivot-pins adjustably clamped in cylindrical openings in the limbs of the bifurcation and having conical ends entering sockets inthe end portion of the member entering the bifurcation.

11. The combination of an oscillatory frame, an articulated pantograph system pivotally mounted thereon and comprising pairs of jointed members, one of which members is bifurcated and the other of which enters the space between the limbs of such bifurcation; a pair of cylindrical pivot-pins a'djustably clamped in cylindrical ,o I enings in the limbs of the bifurcation, and ii entering sockets the end portion ofthe member entering the bifurcation; a tool carried-by said system' adjacent to its point of aving conical ends pulley mounted on the-frame; and an adjustable driving connection-between the pulley and the tool. ,12. The combination of an oscillatory framefan articulated pantograph system pivotally mounted thereon andcomprising pairs of jointed members one of which members is bifurcated and the other of which enters the space between the limbs of such bifurcation; a pair of cylindrical pivot-pins adj ustably clamped in cylindrical openings in the limbs .of the bifurcation and having conical ends entering sockets in the end portion of the member entering the bifurcation; a tool carried by said system adjacent to its point of pivotal connection with the frame; a drivingpulley mounted on theframe; and a pin-andslot driving connection between the pulley and thetool. F l 13;." The combination with a movably- I mounted articulated pantograph system emseam bodying a large and a small cell, of .a supporting-frame cooperating with a member of j which each member of the large cell is adapted to slide, and which frame is adapted to move about anaxis transverse to a pivotal axis of the system, and a tool and tracer carried by the system.

14. The combination with a pantograph system comprising a large and small cell and which is movably mounted to swing about a vertical axis, of a supporting-frame coactin'g with a member of which each member of the large-cell is adapted to slide, and which frame is adapted to move about'a horizontal axis, a r 5 work-performing member carried by one cell oi the system, and a guide for said work-performing member carried by the other cell.

15. The combination with a pantograph system comprising a large and a small cell, and which is suitably mounted to be carried about a vertical axis, of a supporting-frame cooperating with a member of which each 'member of the largecell is adapted to move, and which frame is adapted to turn about a horizontal aXis; a rotative work-performing member carried by one cell of the system, and a guide for: said work-performing member carried by the other cell.

V 16. The combination-with a pantograph system comprising apairof cells and which is mounted to swing about an axis, of a supporting-frame coacting with a member of which each member of oneof the cells is adapted to slide, and whichirame is adapted to move aboutanothenaxis; a' rotatiize work-performing member carried byone cell of the system,

and a guide for said workperforming mem-,

I ber carried by the other cell and having a suitable operative surface.

17 The combination with a 'pantograp system comprising a large and a small, cell and which swings about a vertical axis, of a supporting-frame in contact with the members of Whiclitlie meinbersnfthe largeoellareadapt- 4mmwhichframeisadaptedto move" in a horizontal axis a rotative work-perform- V ing member carried by one cellof the system Ward andaway from the plane of the system gaging at one end with the arm of a su large and a small cell, of a supporting-frame a guide for said Work-performing member mounted on the other cell and adjustable toand having a conical operative surface.

- 18.. The combination with a supportfor the members of a pantograph system and which support is movable about an axis disposed substantially parallel to the plane of the system', of a pantograph system movably mounted thereon and movably connected therewith; a work-performing member, and means for guiding said work-performing member carried by said system; and retaining-bars secured to said su port and between which and the support the pantograph system is adapted to move. Y

19. The combination with a movable frame, of a pantograph system pivotally mounted thereon and having an axis of movement between two of its jointed members coincident with the aXis of its connection with said frame.

20. The combination with a movablymounted supporting-frame having a pair of projecting arms, of a pantograph system com'rising a member having. a bifurcated end ocated between the said projected arms,

a member projecting into the space between" 73" the limbs of said bifurcation, and a pair of members secured to said limbs and each en ortportion of the second graph system. j

21. The combination with a mounted articulated pantograph systemcomprising a 1n contact with a member of whicheach mem- .ber of the large cell is adapted to slide, and

which frame is adapted to move about an axis;

transverse to the axis of. the system, andia tool and tracer carried by the system.

FRANCIS H. RICHARDS.

Witnesses:

FREQ JIFDOLE, C. EnYoss.

mg-frame, and at the other end with t *e en d portionv of the panto 8o'. 

